Multiplex telegraphy



t e e h S .w e e h s 3 VM. H u R m L Ev Am X m JP m L U M H d 0 M 0 W Patented May 20, 1890.

(No Model.) 2 3 Sheets-Sheet 2.

' P. J. PATTI-1N.-

MUL'TIPLEX TELEGRAPHY. No. 428,223. Patented May 20, 1890.

(No Model.) 3 Sheets-Sheet 3.

F. J. PATTEN.

MULTIPLEX TELEGB-APHY. No. 428,228, Patented May 20, 1890.

Qwmea UNITED STATES PATENT OFFICE.

FRANCIS JARVIS PATTEN, OF NEWV YORK, N. Y., ASSIGNOR TO J. M. SEYMOUR, OF BRICK CHURCH, NEW JERSEY.

MULTIPLEX TELEGRAPHYY.

SPECIFICATION forming part of Letters Patent No. 428,223, dated May 20, 1890. Application filed January 10, 1890- Serial No. 336,578. (No model.)

To all whom it may concern:

Be it known that I, FRANCIS JARVIS PATTEN, a citizen of the United States, residing in the city, county, and State of New York, have invented certain new and useful Improvements in Multiplex Telegraphy, of which the following is a specification.

The invention described and claimed in this application is simply an elaboration or special form of other systems patented to me in various issued patents and pending applications; and it consists, essentially, of a two-line double-circuit system, inwhich one lineis used independently for synchronizing and nothing I 5 else, and another distinct line is used as a telegraphic or communicating line, and connects simply the sending and receiving instruments at two or more distant stations, the communicating-line being connected to the spindles that carry the synchronously-revolving trailers which connect different instruments in rotation at the two ends to the communicating-line. I have previously patented such a double-circuit system in which two independent lines are used, one for synchronizing and one for telegraphic communication, (see No. 395,509, of January 7, 1889,) but not in connection with the particular devices and apparatus shown in this application, and I desire in this application to show more particularly the combination of such a doubleline system with the following elements: motors for'synehronizing, a system of circuits, and methods of driving the latter in syn- 3 5 ehronism by means of a separate controlling synchronizing-line circuit, and the particular sending and receiving apparatus, all shown and claimed separately in other pending applications and patents issued. 4o

3 should be placed in the order named from left to right, Figs. 1 and 3 represent the terminal stations X and Y at the two ends of the line, with one complete set of instruments for communicating shown at each end, Y being represented as sending to X, also the synchronizing-relays for driving the motors that carry the revolving trailers thus made to sweep over the tables of distributing-segments placed at the ends of the line. Fig. 2

In the drawings, in which Figures 1, 2, and

shows any intermediate or other point of the line atwhich a revolving polechanger is placed, the function of which is to reverse a battery constantly with respect to the synchronizing-line. Fig. 4 shows details of the synchronizing apparatus, the system of circuits, and means and devices by which the motors are caused to move in synchronism bythe action of the synchronizing-relays. 4 is detail. Figs. 1,2,and 3 are systems. Fig.

i is identical with other devices and circuits shown in a previous application now pending, and, although not claimed in this one, will be briefly described.

In Fig. 4, P P is a polarized relay in the o synchronizing-line and represents either the relay P at station X or P at station Y, each of these being connected to motors at these stations that drive the trailer-arms Tr and T1" through a system of circuits and connec- 7o tions like those shown in detail in Fig. 4. The polarized relay P P, Fig. 4, is in the synchronizing-line, the current in which is periodically and rapidly reversed, and thus keeps the tongue 25 of this relay in rapid and constant vibration between its contact-stops E and E and this tongue is so connected to the vibrator V V, as shown, through two circuits and local sources of energy, that the tongue of the vibrator-h follows the motions of the relay-tongue accurately, but with far greater strength, being on a local circuit like y an ordinary sounder with respect to its linerelay. This vibrator in turn has its tongue h so connected to a split battery and'the armature-brushes B and B of the motor-mill that the current in the armature is reversed at every change of the vibrator-tongue. Now the armature-circuits are-so connected (while the field is permanently energized by aclosed o circuit and source of energy of its own) that the armature will continue revolving in the same direction, providing its rate is such that a reversal of current is caused by the vibrator at each quarter of a revolution, and it 5 tends always to acquire this speed, no matter how fast or how slow or how changeable the rate of the vibrator maybe, and the speed may be gradually increased to any; rate desired and then maintained constantly. All

these features of detail have been elaborated and claimed in other applications, and the steps are briefly described here simply to 6X1 plain how the two trailer-arms Tr at X and Tr at Y are maintained in synchronous motion by the polarized relays P at X and P at Y.

The general system will now be described. An independent synchronizing-line S L, Fig. 2, extends both ways to the station X on the left and Y on the right, at which points itis grounded through suitable resistances Rh at E and E At the stations X and Y the polarized relays P and P are included in this synchronizing-line. At some other point in the line a battery of suitable electro-motive force is connected to this synchronizing-line through a revolving pole-changer P C and brushes bearing against its surface. This pole-changer is driven rapidly but uniformly by a motor, so that the current of the battery S B is rapidly reversed in the line, and these reversals keep the tongues of the relay P at X and P at Y in constant and uniform vibration, and through the agencies previously described and shown in Fig.4 these relays keep the synchronizing-motors that carry on their spindles the trailers Tr at X and T9 at Y in uniform synchronous motion. I

An independent line CL CL, called the communicating-line, extends from the trail er-sp'indle at X to the trailer-spindle at Y, and this line is grounded at E and E successively, and in rotation through different sets of sending and receiving instruments at each end as they make successive contact with the different segments of the segmental distributers, over which they continue to sweep in unison with each other.

The sending and receiving apparatus,- of which one set is shown at each end, need not be specially described here. It is identical with that shown and claimed in a pending with, bearing Serial No. 336,576. The communicating-line has a separate battery M B at X and M B at Y, both parts of which are conjointly brought into action by closing the sending key at one end while the line is placed to earth at the other.-

None of the special devices are claimed in this application, nor is it supposed that a double-line system for such uses is new, and what I desire to claim is the combination of the special devices shown, all of which are claimed in other patents and applications of mine, with a double-line synchronizing and communicating system, using these special devices of my own as shown.

I claiin- 1.- In a system of synchronous multiplex telegraphy, the combination of two main lines, one of which includes two or more synchronizing re'lays and an alternating-current gen= erator, said generator being located in the line between two of said relays and the other two or more distributers having independent local earth-circuit connections, and signalingbatteries with transmitting and receiving apparatus, substantially as described.

2. In a system of synchronous multiplex telegraphy, a synchronizing-relay included in a main-line circuit, with a single source of electrical energy, in combination with a distributer included in a separate main-line circuit, with independent signaling-batteries, transmitters, and receivers, and an electrical motor for propelling the trailer of the dis tributer, the field-magnet of the motor being energized by a constant source of electrical energy and its armature having electrical connections with a split battery through the armature of a local relay controlled in turn by local-battery connections through the main-line relay, substantially as described.

' 3. In a system of synchronousmultiplex telegra 3h -aseries ofs nchronizin -rela sincluded in a main-line circuit with an alternating-current generator, which is also located directly in the main line and between two of said relays, in combination with a series of distributers included in a second mainline circuit, and electrical connections between the relays and the distributers for regulating their synchronism with signaling-batteries, transmitters, and receivers for the sec- 2 ond main line circuit, substantially as described.

4. In a system of synchronous multiplex telegraphy,a main line including an alternating-current generator and polar relays, a sec- 3 end main line including current-distributers I oonn ected through independent local circuits,

batteries, signaling and receiving instruments, to earth propelling electric motors for the trailers of the distributers, local-battery connections between the polar relays and the armatures of the propelling-motors for keeping them in synchronism, substantially as described. application filed by me of even date here- 5. In a system of synchronous multiplex telegraphy, a series of polar relays and an alternating-current source of electrical energy included in one mainline, a series of currentdistributers having their trailers included in a second main line, and earth-connections through independent batteries, transmitters,

.and rec'eivers, with electric motors for propelling the trailers, having their field-magnets constant and their armatures connected through split batteries and local-circuit connections with the polar relays for keeping said trailers in synchronism, substantially as described.

6. In a system of synchronous multiplex telegraphy, a series of synchronizing-relays, two or more included in one main line, a second main line including a series of distributers, two or more, electrical connections be tween each relay, and a vibrator adapted to follow the vibrations of the relay-armature, and electrical connections between the armature of the vibrator and a motor which propels the distributer, in combination with a line having multiplex transmitters and receivers, in combination with a vibrator having local-circuit connections with the relayarmature, and a split battery connected at its middle to one brush of a motor which drives the trailer of the distribnter and at its opposite ends to the armature of the vibrator and the remaining brush of the motor, substantially as described.

FRANCIS JARVIS PATTEN. Witnesses:

O. J. KINTNER, A. V. HINEY. 

